I want to know if this KV motor is good or its too high.. what pinion would I need if I have the .1 mod ? thanks

is that a new heli? Oh no honey, its the same one w/different stickers.....

I think it has a 5mm shaft in which case you are limited to a 10tooth mod1 pinion only. That will leave you options from 2000rpm to 2250rpm with a jazz or jive. Numbers will vary depending on ESC and governor.

EDIT: It is not a powerful motor by todays standards and you are right on the RPM limit with new generation packs. For sport flying and cool efficient flights I think it will work ok.

Regards

Fergus

Been using a 45-07 on 10S in my logo 600 since I built it.
Running on Mod 0.7 and 13, 14 or 15 tooth pinion depending what head speed I want, and have had absolutely zero issues. Its a very smooth and efficient motor. Not a rocket ship, but certainly no slouch either.